Serena Williams upset in US Open by Karolina Pliskova - Sports Illustrated

Serena Williams upset by Karolina Pliskova in U.S. Open semifinal

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For Serena Williams, the wait for Grand Slam title No. 23 will have to wait until next year.  Williams was upset in the U.S. Open semifinals on Thursday night by Karolina Pliskova, who earned a 6-2, 7-6(5) victory at Arthur Ashe Stadium.